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Query: UMLS:C0019693 (HIV)
 170,526 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

WHO finds that the health services and the health systems in India have improved. For example, India has made considerable improvement in expansion of health services to rural areas (7-10% expansion) and to the poor. Further, allocation to the minimum needs program, according to the state sector plan, has risen from 42.6% to 50%. In addition, infant and maternal mortality rates have fallen. Improved immunization coverage, prenatal care services, diarrhea prevention, malaria control, and contraceptive use have all contributed to the reduction in infant and maternal deaths. Health and welfare programs have generally institutionalized the primary health care concept of community participation. Training for health workers, policymakers, and personnel from nongovernmental organizations has expanded. Nevertheless, life expectancy has essentially not changed. Besides, WHO notes that the disease patterns have not changed. Some regions of India have disease patterns of developed countries, however. India has the highest number of malaria cases in southeastern Asia (almost 71%) and the second highest number of women with anemia. The number of HIV-positive and AIDS cases is growing. More than 374 million people are at risk of lymphatic filariasis, and Japanese encephalitis has become entrenched in India. 5% of the population are positive for hepatitis viruses. 1% have iodine deficiency disorders.
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PMID:WHO commends India. 145 31

A series of nucleosides were synthesized in which the 4'-hydrogen was substituted with either an azido or a methoxy group. The key steps in the syntheses of the 4'-azido analogues were the stereo- and regioselective addition of iodine azide to a 4'-unsaturated nucleoside precursor followed by an oxidatively assisted displacement of the 5'-iodo group. The 4'-methoxynucleosides were made via epoxidation of 4'-unsaturated nucleosides with in suit epoxide opening by methanol. Reaction-mechanism considerations, empirical conformation rules, NMR-based conformational calculations, and NOE experiments suggest that the 4'-azidonucleosides prefer a 3'-endo (N-type) conformation of the furanose moiety. When evaluated for their inhibitory effect on HIV in A3.01 cell culture, all the 4'-azido-2'-deoxy-beta-D-nucleosides exhibited potent activity. IC50's ranged from 0.80 microM for 4'-azido-2'-deoxyuridine (6c) to 0.003 microM for 4'-azido-2'-deoxyguanosine (6e). Cytotoxicity was detected at 50-1500 times the IC50's in this series. The 4'-methoxy-2'-deoxy-beta-D-nucleosides were 2-3 orders of magnitude less active and less toxic than their azido counterparts. Modifications at the 2'- or 3'-position of the 4'-substituted-2'-deoxynucleosides tended to diminish activity. Further evaluation of 4'-azidothymidine (6a) in H9, PBL, and MT-2 cells infected with HIV demonstrated a similar inhibitory profile to that of AZT. However, 4'-azidothymidine (6a) retained its activity against HIV mutants which were resistant to AZT.
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PMID:Synthesis and anti-HIV activity of 4'-azido- and 4'-methoxynucleosides. 157 38

Individuals who are infected with human immunodeficiency virus (HIV) are known to have a high incidence of autoantibodies. In this study, serum samples from 100 individuals with HIV infection were tested for granulocyte antibodies (red cell antibodies, lymphocytotoxic antibodies, circulating immune complexes, and serum immunoglobulin G levels) by granulocyte agglutination (GA) and granulocyte immunofluorescence (GIF) assays. Granulocyte antibodies were detected in 66% of serum samples by GIF and in 21% of serum samples by GA. None of the positive sera reacted with granulocyte antigens of known specificity. Antibodies that reacted with red cell antigens other than ABO were detected in only three serum samples, but lymphocytotoxic antibodies were detected in 62% of patients. All serum samples were tested by immunoblotting with granulocyte plasma membranes. Only two samples were found to be positive; one sample reacted with a 58 kd protein and one reacted with a 55 kd protein, but neither serum sample immunoprecipitated any protein from granulocytes that were labeled at the cell surface with iodine 125. Since immune complexes that are bound to granulocyte membranes can be detected by GIF, circulating immune complex levels were measured in all 100 samples. Immune complexes were increased in GIF-reactive serum samples compared with GIF-nonreactive serum samples (23.3 +/- 19.5 micrograms Eq/ml [mean +/- SD] vs 9.6 +/- 8.1 micrograms Eq/ml, p less than 0.001) but not in GA-reactive serum samples compared with GA-nonreactive sera (24.4 +/- 21.3 micrograms Eq/ml versus 16.9 +/- 16.0 micrograms Eq/ml, p = 0.10).(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Antibodies to granulocytes in patients infected with human immunodeficiency virus. 159 18

Peroxidase, H2O2, and a halide form a powerful antimicrobial system in phagocytes and tissue fluids, and certain microorganisms can serve as the source of H2O2 for this system. H2O2-generating Lactobacillus acidophilus (LB+) is present in the vagina of most normal women and peroxidase has been detected in vaginal fluid. LB+ at high concentration is viricidal to HIV-1, and, at levels where LB+ is ineffective alone, the addition of peroxidase (myeloperoxidase, eosinophil peroxidase) and a halide (chloride, iodide, bromide, thiocyanate) restore viricidal activity. LB+ can be replaced by H2O2, but not by non-H2O2-producing LB, and viricidal activity is inhibited by azide and catalase. The survival of HIV in the female genital tract and thus the likelihood of transmission may be influenced by the activity of the LB(+)-peroxidase-halide system in the vagina.
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PMID:Viricidal effect of Lactobacillus acidophilus on human immunodeficiency virus type 1: possible role in heterosexual transmission. 164 36

Owing to similarities between human immunodeficiency virus and feline retroviruses, the feline model was chosen for the study to investigate the efficacy of timely topical treatment of accidental human immunodeficiency virus infection in the operating room. Cats were subcutaneously inoculated with either feline leukemia virus or feline immunodeficiency virus. An effort was made to neutralize the virus in loco either by infiltration of the inoculation site with povidone-iodine or with monoclonal antibodies, or by cauterization and excision. The animals were periodically monitored for feline leukemia virus antigens or for feline immunodeficiency virus antibodies. The results indicated that in the feline model, the development of generalized virus infection may be prevented by local measures if applied immediately.
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PMID:Prevention of retrovirus infection after injury with contaminated instruments: an experimental study. 164 94

Inhibition of human immunodeficiency virus reverse transcriptase is currently considered a useful approach in the prophylaxis and intervention of acquired immunodeficiency syndrome (AIDS), and natural products have not been extensively explored as inhibitors of this enzyme. We currently report that the reverse transcriptase assay developed for the detection of the enzyme in virions involving polyadenylic acid.oligodeoxythymidylic acid (poly rA.oligo dT) and radiolabeled thymidine 5'-triphosphate (TTP), can be applied as a simple method for screening the human immunodeficiency virus type 1 reverse transcriptase (HIV-1 RT) inhibitory potential of natural products. As reported herein, 156 pure natural products have been examined in this system. Benzophenanthridine alkaloids such as faragaronine chloride [1] and nitidine chloride, which are known inhibitors of avian myeloblastosis virus reverse transcriptase, demonstrated potent activity in the HIV-1 RT system, and 1 (IC50 10 micrograms/ml) was adopted as a positive-control substance. Additional inhibitors found were columbamine iodide [2] and other protoberberine alkaloids, the isoquinoline alkaloid O-methylpsychotrine sulfate [3], and the iridoid fulvoplumierin [4]. A number of indolizidine, pyrrolizidine, quinolizidine, indole, and other alkaloids, as well as compounds of many other structural classes, were tested and found to be inactive. A total of 100 plant extracts have also been evaluated, and 15 of these extracts showed significant inhibitory activity. Because tannins and other polyphenolic compounds are potent reverse transcriptase inhibitors, methods were evaluated for the removal of these from plant extracts prior to testing. Polyphenolic compounds were found to be responsible for the activity demonstrated by the majority of plant extracts. After appropriate tannin removal procedures were established, the bioassay system was shown to be generally applicable to both pure natural products and plant extracts. The method also proved useful in directing an isolation procedure with Plumeria rubra to yield fulvoplumierin [4] as an active compound (IC50 45 micrograms/ml).
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PMID:Evaluation of natural products as inhibitors of human immunodeficiency virus type 1 (HIV-1) reverse transcriptase. 171 Jun 53

A recently developed assay for measuring infectious HIV-1 particles was used to determine the stability of the virus under various storage conditions as well as the effect of commonly used disinfectants. At the optimum pH of 7.1 the half life of the virus ranged from approx. twenty-four hours at 37 degrees C to no significant loss over 6 months at -75 degrees C. Drying the virus on a glass surface or freezing caused a 5-12 fold and 4-5 fold decrease of activity, respectively. The dried preparations, however, were about as stable as when stored in a buffered solution. A solution of iodine and detergent (2% Jodopax) was the only disinfectant examined which removed all detectable HIV-1 activity. Isopropanol and ethanol were more potent than acetone; however, all three solvents left some viable particles after a 30 min treatment with 70% solutions.
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PMID:Survival of HIV-1 activity after disinfection, temperature and pH changes, or drying. 180 53

The enzyme beta-lactamase (penicillin-amido-beta-lactam-hydrolase, EC 3.5.2.6.) has been shown to be suitable for use in ELISA procedures. The assay proposed requires a conjugate containing a beta-lactam-hydrolase as the enzymatic component, penicillin or one of its derivatives as substrate and an iodic complex (an iodine-starch or an iodine-polyvinylic alcohol complex) as the chromogenic component. Binding of conjugate molecules results in the transition of the iodic complex from dark blue to colourless. The transition is readily visualized without the aid of an EIA reader. The decolorization occurs specifically giving a clear-cut yes/no decision without a cut-off value. The rate of the colour transition strongly depends on the amount of bound conjugate. beta-lactamase-based ELISA techniques are of potential use in the immunological diagnosis of some virus diseases. The sensitivity and specificity of the assay were assessed on a panel of 670 negative and 141 positive HIV-1 sera, giving values of 100% and 99.85%, respectively.
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PMID:A simple ELISA procedure for HIV-1 based on the enzyme beta-lactamase. 206 17

Three cases of prostatic abscess diagnosed in our service in the past year are reported. The current treatment of this disease entity and the changes observed relative to the pathogenic flora of prostatic abscess in certain groups at risk today are discussed. All three cases underwent percutaneous transperineal debridement of the purulent collection. An 8 Fr silicone catheter was left indwelling in the residual cavity of the abscess to permit lavage with povidone-iodine solution during the first 3 or 4 days post-operatively. At one week, the abscess had completely resolved in all of the cases as evidenced by the ultrasound control. E. coli was isolated in two patients with diabetes and Staph. aureus was isolated in an HIV-positive intravenous drug addict who also had renal abscess from Candida albicans.
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PMID:[Prostatic abscesses: percutaneous treatment]. 206 25

A sensitive, amplified assay for HIV-1 pol region RNA was developed using RNA probes which are replicated by the RNA-dependent RNA polymerase, Q beta replicase. A synthetic target RNA was hybridized in cell lysates prepared with guanidine thiocyanate with an RNA reporter probe and four deoxyoligonucleotide "capture" probes. The RNA reporter probe was a recombinant MDV RNA molecule generated by transcription from a cloned cDNA template. Capture probes are synthetic oligonucleotides that are complementary to the target nucleic acid and that bear 3' poly d(A) tails. The ternary hybrids (of target RNA with capture probe and reporter probe) were captured on oligo d(T)-derivatized paramagnetic particles by hybridization with the d(A) tails of the capture probes. Non-hybridized reporter probes were removed by washing and successively eluting and recapturing the ternary hybrids on fresh particles. After three cycles of elution and capture, the hybrids were eluted in a low ionic strength buffer and the MDV RNA reporter probes were amplified directly by Q beta replicase. Amplified product RNA was detected by fluorescence using propidium iodide. The assay detects one femtogram (600 molecules) of a synthetic target RNA containing the pol region of HIV-1. The complete assay takes about 2.5 hours.
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PMID:Amplified detection of viral nucleic acid at subattomole levels using Q beta replicase. 227 13


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